30 Oct
2003
30 Oct
'03
5:58 p.m.
Jim,
CTD acts as a SIP client -- i.e., it takes mydomain.com and tries
to resolve it via DNS. If the resolution fails, the transaction
fails. That's completely orthogonal to function of "alias" which
is used for proxy server's domain matching.
if mydomain.com is served by the same server, CTD initiates a transaction,
sends it to itself, and in proxy mode it recognizes it as a request
for itself using alias.
-jiri
At 04:46 PM 10/30/2003, Jim Burwell wrote:
Hi,
I was trying to get click-to-dial working from SERweb and it was failing for unclear
reasons. I then experimented with the "ctd.sh" script, which does the same
thing as the SERweb PHP code. I found that it would fail during the 'dummy
invite' stage, returning an odd error if I used a URI which used a SIP domain/realm,
but would work fine if I used the IP address of the SIP proxy as the domain. i.e.:
./ctd.sh sip:joebob@mydomain.com sip:billybob@mydomain.com <- fails
./ctd.sh sip:joebob@1.2.3.4 sip:billybob@mydomain.com <- succeeds
The reply from SER would be "500 fifo_uac: no mem for hf block" . The log file
would have these errors:
ERROR: mk_proxy: could not resolve hostname: "mydomain.com"
ERROR: uri2proxy: bad host name in URI <sip:joebob@mydomain.com>
ERROR: uri2sock: Can't create a dst proxy
ERROR: get_hf_block: send_sock failed
ERROR: fifo_uac: no mem for hf block
So it appears that SER didn't understand that the URI's domain was itself, even
though there's a host alias line in the ser.cfg file listing "mydomain.com"
as an alias for this host. It's as if it thinks it needed to relay the transaction to
another SIP router, and look up an IP to do so. If "mydomain.com" were placed
in /etc/hosts as an alias for the system SER was running on, or if a DNS SRV entry for the
SIP domain were created pointing to the SER system, voila, the "sip:user@domain"
form would work just fine.
Is this a bug ? I think SER isn't checking SER host aliases against the SIP domain if
the SIP request comes in via the fifo t_uac_dlg() command.
I'm using the SER release 0.8.11-r1, aka the "stable CVS" release.
TIA,
Jim
--
+---------------------------------------------------------------------------+
| Jim Burwell - Sr. Systems/Network/Security Engineer, JSBC |
+---------------------------------------------------------------------------+
| "I never let my schooling get in the way of my education." - Mark Twain |
| "UNIX was never designed to keep people from doing stupid things, because |
| that policy would also keep them from doing clever things." - Doug Gwyn |
| "Cool is only three letters away from Fool" - Mike Muir, Suicyco |
| "..Government in its best state is but a necessary evil; in its worst |
| state an intolerable one.." - Thomas Paine, "Common Sense" (1776)
|
+---------------------------------------------------------------------------+
| Email: jimb(a)jsbc.cc ICQ UIN: 1695089 |
+---------------------------------------------------------------------------+
| Reply problems ? Turn off the "sign" function in email prog. Blame MS. |
+---------------------------------------------------------------------------+
_______________________________________________
Serusers mailing list
serusers(a)lists.iptel.org
http://lists.iptel.org/mailman/listinfo/serusers
--
Jiri Kuthan http://iptel.org/~jiri/